I set up the QuNexus for six channels of channel rotation. I set note toggle to on.

In Ableton:

I set up six MIDI tracks, one per channel.

The output of MIDI tracks 1 & 4 are sent to (what I'll call) consolidated track A, which has an arpeggiator feeding an instrument.

The output of MIDI tracks 2 & 5 are sent to consolidated track B, which has an arpeggiator feeding another instrument.

The output of MIDI tracks 3 & 6 are sent to consolidated track C, which has an arpeggiator feeding yet another instrument.

That's the basics of it, tho I also add stuff like the "Scale" MIDI effect between the arpeggiators and instruments, and sometimes the "Chord" effect before the arpeggiator. Also, I've varied the routing, like 1 patch for one instrument, 2 for another, and 3 for the third.

This can generate some interesting ambiences, for sure.

And using this is where I discovered that the octave shift re-triggers EVERYTHING, so now I take that into account. You can hit STOP in Ableton (even if you weren't playing in Ableton) and all notes go off, but then you can hit an octave button and everything starts going again.